rear differential ID - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 08-01-2015, 11:44 AM Thread Starter
 
Join Date: Jul 2015
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rear differential ID

Hi. I'm a newbie to this forum and I'm sure this type of question has been asked a thousand times, but I'm going to do it again.... I've got a 10 bolt posi B-O-P that I'd like to find out what it is out of. The only numbers discernible is the casting number on the bottom right ear of the housing. The number (I think) is 9782977. Can this tell me anything?
Thanks for the help.
mcyphert is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 08-01-2015, 02:20 PM
 
Join Date: Jul 2013
Posts: 83
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Did you Google it?
GotTogO is offline  
post #3 of 8 (permalink) Old 08-01-2015, 10:23 PM
 
Join Date: Jan 2015
Location: Injun Territory, 'Merica!
Posts: 1,611
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 121 Post(s)
I just chunked a bare gray iron Pontiac 8.2 housing with the "977" casting. The housing came out of a '66 Sprint 6 LeMans and was rust pocked, or I'd have kept it in one of the racks.
Pinion head is offline  
 
post #4 of 8 (permalink) Old 08-03-2015, 09:21 PM Thread Starter
 
Join Date: Jul 2015
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by GotTogO View Post
Did you Google it?
Google wasn't any help....
mcyphert is offline  
post #5 of 8 (permalink) Old 08-03-2015, 09:37 PM
 
Join Date: Jul 2013
Posts: 83
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
It's always worth a shot.
GotTogO is offline  
post #6 of 8 (permalink) Old 08-04-2015, 10:38 AM
 
deanhickey's Avatar
 
Join Date: Apr 2015
Location: London and Maine
Posts: 153
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Garage
What year is the axel? In 1968 the ID number was moved to the left hand axel tube. there may still be a sticker on the lefthand rear brake drum. there was also stamping machine breakdown in 67 where the stamp was moved to top of the left hand axel tube. Hope this helps and good luck. i would recommend getting a copy of gto restoration guide by Paul Zazarine andChuck Roberts. That is where i was able to get this information.
deanhickey is offline  
post #7 of 8 (permalink) Old 08-04-2015, 01:56 PM
 
Join Date: Jan 2015
Location: Injun Territory, 'Merica!
Posts: 1,611
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 121 Post(s)
The gray iron housing 9792977 was built with axle tubes and is either late '66 model use, or '67 model use. This particular center housing casting number was even used on housings for lower performance '67 Firebirds.


With the stamped assembly codes being tough to read, the easist way to identify which model year application is to look at the coil spring perches.

-Is the perch flat with a hole in the center, and take a stamped steel "ear" shaped piece to bolt the coil spring down, if so, with that casting number, late '66 usage.

-OR does the top of the coil spring perch flare up 1/2", with a locator ring being a part of the perch? If so, the rear was used in a '67 or extremely early '68 Pontiac, or possibly, a '67 Buick A-body.
Pinion head is offline  
post #8 of 8 (permalink) Old 08-08-2015, 10:02 AM Thread Starter
 
Join Date: Jul 2015
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks guys. This will definitely give me something to go on.
mcyphert is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions.

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Rear differential gen. ?s IMCauley Drive train, suspension, alignment and brakes. 8 01-06-2011 09:15 PM
Rear differential part number VettenGoat 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions. 1 06-16-2010 05:17 PM
harrop rear Differential cover? alptbird Drive train, suspension, alignment and brakes. 0 07-10-2006 11:46 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome